11.24: Two wave pulses k/mlsd 9d-c(6n sa:dwrk 90 uwbm2s8r travel to the right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when t mrdk-m92udsd blr 0sc na/w(8k:6 sw9he centers of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes th(qmz3 f 2e j/vn :bbe/gt4qmv5e surface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the transmitted w3mf/v :qb 2/j v( gneqmbt4z5eave?

  12.02: A ray of light passes straight downward thro -,c8bs s8n fx fhj.8sawqb*s3ugh the point labeled B in the diagram shown. The ray reaches a flat *b8qssafnwch ss.x b-3,f8j8mirror placed at an angle $\Theta$ to the horizontal as shown. Which one of the locations labeled in the figure best represents the point through which the ray reflected from the mirror will pass?

  00.04: Specular reflection occurs whenever light is incident onsuyn77et07e7 exth h 7

  05.18: A student hold a hand mirror to observe the back of her hea8*6 dcpvf: z1 gen(/d8 iycbskd while standing in front of and looking ivi :kyge c*6pbc1 8/(n8zsdfd nto a wall mirror. If she is standing 4 ft in front of the wall mirror and she holds the hand mirror 1 ft behind her head, she will see the back of her head how far behind the wall mirror?

  14.25: It is observedwkbwq6mynqt0 yy;bbzpkz /*)-n. )9w that a light ray changes direction when it enters a new material. Which one of the following cho6/qw )pky b yynw. 9*bz-n w0b)qmtzk;ices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavellxt vm, er3 5zc-(qt*wength 400 nm in a transparent material. What is the index of re wm5t*z-x qlc 3e,vrt(fraction of the material?

  98.04: As sound travels from steel into:p7if4b9e x6q+mrywqt4ksm8 air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium with n9d8u;rzy tz 5 sn.2 gk6vjrz5a different index of refraction tr2z8gd9 uz jr kn5.yz;s56nv which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a tuning fork of single frequency tp2++ tftl, u7h-mbs(*x hf 1rdjvru3hravels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the wavelength and frequency of the sound as it passes from air to rr sutbmhf ruvtx+,f d2 jlph(7- 13*+hock?

  14.28: A waterproof speaker placed at the bottom of a swiv/g 58fmz8g kgl :ua.ymming pool emits a sound wave that travels toward the surface of th .8fgga5:y/ vuzkl g8me water. In the water, the sound wave has a frequency $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?

  02.33: A short burst of white gxdxu936n r 6a9u7qor light strikes a rectangular glass block with an angle of incidence of u9x39 aduox g7n6qr6r $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed toward a point P on a boundary 2kya/ j f+ua3-n:gzpgas shown to the ripj2gnafkz:3 g+y/ u a-ght. Which segment best represents the refracted ray?

  98.17: Which diagram best represents what happens to a ray -,/d 6kpzzfqab6 )ngqof light entering air from water? Air is at the top igdb6/qz,anzfkq6- ) p n all diagrams.

  94.11: The critical angle of a material is the anhvt7 7qz6k0 ce oq87sdgle of incidence for which the angle of refra 8q7dk0cvt7ohsqe6 z7 ction is:

  95.12: The principle underlying fo52 c:*lq jgy:rfmgl7iber optics is:

  98.36: The critical angle in a transparencu,ivr6sfks54sxzd:*/ d6 nlt substance surrounded by air is $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from material X with an indw5f: qawl1/ab . lxrd3ex of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in material Y is v, what is the speed of light in material wb5: qwa1xdl.r/fa l3 X?

  03.15: A jeweler can distinguish between a diamond and a pieiy10ra *m z9;mkm-vgjce of glass by observing the critical angle of the light in each ma1a mzik yr9m*g0 mj-v;terial. Glass with an index of refraction of 1.52 has a critical angle of $41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines from air into a cleaczc/p9y.;b5k rl:a pd ba..4;cekokhr material. When the light makes an angle of incidencpyp/rl5 :zk . .ckbc.a;h9bedc ok4; ae equal to $30.0^{\circ}$, the light refracts at an angle of 1$5.0^{\circ}$. If the light is shone from an angle of incidence of $60.0^{\circ}$, what is the angle of refraction?

  95.40: A Metrologic laser is embedded in a mat0y, ri0je()e ajjvl7yo2jk6h erial of index of refraction n. The laser beam emerges from theoj 6e)ih0k0jyv jj 2 e7ayrl,( material and hits a target. See the accompanying figure for the position parameters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 tok99yxfh kxo/ ak)49t c medium 3 as shown in t9xky 4hax9) cotk9/kfhe accompanying figure. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to mediu/-hr o(j6c6rkwx -xuode-d 8o m 2 to medium 3 as shown in the diagram. What may be concludedd(jo -ukx8x6-dh- r6r/ ewoc o about the three indexes of refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light 5yf c6b3gm1o; msjck4 ray takes passing through three4fscmcb53m ;ky6 go 1j transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below sho (ob+*rye 4r6zi4tmkdws the path taken by a monochromatic light ray traveling thro*di b4tre46o+ky( rz mugh three media.The symbols $v_1$,$\lambda_1$ , and $f_1$ represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

  99.26: A beam of light travebuu 2,hc4/eq iling in glass ($n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?

  04.35: A ray of light is incident on the surface of a rectangular block of gauq. sd:)gq/qg ks dpy04: (nr* sfkm(lass at an a rgq0d*(m 4say(nq) su s:kfg:p /dk.qngle of $45^{\circ}$. It refracts into the glass and then strikes the side of the block as shown in the diagram. What would be the most likely path of the light after striking the side of the glass block?

  13.27: Light of wavelength 600nm is trans3,rq fegxq)xof2 i(2bid5v (nmitted from air into a piece of glass. Which one of the labeled ard,3e 5 gvoir(2 xq(x bq2nif)frows best indicates the path of the light ray after it enters the glass?

  14.44: A ray of monochromatic light enters t .de d8yt .i1kenl5my4he right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the lettered rays sh.yn.lek tym4d1 id85eows the path of the light after it exits the glass?